Behaving boldly, with contempt or disregard for propriety in behavior toward others; unblushingly forward; impertinent; saucy.

improperly forward or bold; "don't be fresh with me"; "impertinent of a child to lecture a grownup"; "an impudent boy given to insulting strangers"

Lacking modesty; shameless.

marked by casual disrespect; "a flip answer to serious question"; "the student was kept in for impudent behavior"